Gets or sets mailbox of the agent responsible for the actual transmission of this email message ('Sender' header).
If 'Sender' is null, it returns first item from From collection.
Namespace: Limilabs.MailAssembly: Mail (in Mail.dll) Version: 3.0.12102.1426
Syntax
Remarks
'Sender' is not required if 'From' property contains only one MailBox.
'Sender' property is needed when message is from more than one person ('From' contains more than one mailbox).
In such case Sender provides information which mailbox is responsible for the actual transmission.